Plug and play, easy to use.Mini and compact, easy to carry.High sensitive buttons, fast response.15 degree ergonomic design, wrist naturally vertical when using.Anti-slip bottom and splash proof design make it more practical.Type: Numeric KeypadMaterial: ABSButton: 18Bluetooth: 3.0Connection Type: USB Wired, 2.4G Wireless, bluetooth-compatible Wireless (Optional)Wireless Version Battery: 1 x AAA Battery (Not Included)Features: Numeric, Anti-Slip, High Sensitive, Mini, Portable, Ergonomic DesignLength: 14cm/5.51" (Approx.)Width: 8.5cm/3.35" (Approx.)Height: 2cm/0.79" (Approx.)Cable Length: 125cm/49.21" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes: (Battery Not Included)[USB Wired/Bluetooth]1 x Numeric Keypador[2.4G Wireless]1 x Numeric Keypad1 x USB Receiver